Padlock



A.July a, w24.

G. GRONELL PADLOCK Filed NN!- 22, 1922 Mmmm/@ 4.5 denotes the usualshackle.

Patented July 8, 1924.

GEORGE GRONELL, F NEW YORK, N. Y.

PADLOCK.

Application led November 22, 1922. Serial No. 602,543.

To'aZZ whom t may concern:

Be it known that GEORGE GRONELL, a citizen of the United States,residing at New York, in the county of New York and State of New York,has invented certain new and useful Improvements in Padlocks, of whichthe following is a specification.

This invention relates to pad locks and has for its object to provide akeyless permutation look which will consist only of a comparativelysmall number of parts which can be easily and readily assembled, therebyfacilitating themanufacture of such locks in quantities and renderingthe cost of manufacture very small.

Mypad lock substantially consists of a solid steel disk formed withcircumferential cavities, in 'one of which the shackle is pivotally andVslidably mounted and in the other one of whichl the free'toothed end ofthe shackle is adapted to be locked by engaging with a pinion meshingwith a rack whose movement is limited by tumbler rings of a permutationlock accommodated in a central cavity of the steel disk.

MyV invention will be more fully Linderstood byreference to thelaccompanying Vdrawing in which similar reference characters denotecorresponding parts and in which 3o Fig. 1 is a'front elevation of thepadlock;

Fig. 2 is an enlarged partial longitudinal section of said lock; Fig. 3a cross section on line 3-3 of Fig. 2; Fig. 4 a cross section von line44of Fig. 1; Fig. 5 a cross section on line 5-5 of Fig. 2; Fig. 6 is aninner view of the boss; Figs. 7-9 show the tumbler rings of thepermutation lock and themanner of their operation, and Fig. 10 is amodification of the'construction of the tumbler rings.

ln the drawing 10 denotes a solid circular disk made of steel and formedwith a central circular cavity 11 and with circumferential cavities `orbores 12, 13. 14 One end of said shackle is formed with an annulargroove 14 and a longitudinal slot 142 movably engaged by a cross pin 15passed through the disk 10 so that the shackle can be raised and swungaround said pin. The other end of is mounted a pinion 16 which projectsthrough a slot 15 terminating in the bore 13 so as to be capable ofengaging the teeth 148 of the shackle to lock the latter in closedposition. On the opposite side the circular cavity hasfanother slot 152which terminates in a groove 17 in which is slidably mounted aV shortrack 18 whose teeth project into the circular cavity and mesh with saidpinion 16. The rack 18 is formed at its inner end with a reduced portion18 forming a tail adapted when the shackle is being unlocked and itstoothed end moved outwardly from the bore 13 to pass into the centralcavity 11. In the locked position the rack is held against downwarddisplacement by means accommodated in said central cavity whichconstitute a permutationlock. According to the present embodiment of myinvention this permutation lock comprises a plurality of split rings 19,2O and 21 frictionally borne in the central cavity one upon the other.The rings are each radially recessed, as at 22, to impart resiliencythereto and are each formed with radial projections 19', 20', 21 ofdifferentl width. The split portion 23 in each ring is such that thetail end 18 of the rack will be allowed to pass into the same.Rotatively .borne in the cavity 11 is a boss in form of a Vdisk 24formed with a central axial extension 25 which at its end has an annulargroove 25 to be engaged by a pin 26 passed through the body 10 andwhereby the boss is secured in said cavity. Extending longitudinallyfrom the inner face of the boss is a pin 27 of a length about equal tothe total thickness of the three superposed rings 19, 20, 21 and servingto cooperate with theirradial projections 19', 20', 21 so as to bringthem in a position where the split 'portions 23 thereof will be inalinementwith one another and with the inner open end of the groove 17infwhioh works the rack 18. In a narrowv bore 28 of theA `vvill arrestthe boss against accidental displacement.

The shoulders or projections 19', 20, 21 Will be arrangedin certainrelationsjto the said cavities 31, so lthat by count'- ing the clicksone can adjust the individual rings according to the particularcombination.

An indicator finger 32 Which may beadjustably fixed to project from theknob por*- tion of the boss 24 will when brought into alinement With amark on the outer face of the-:disk 10, indicate the position of the pin27 operating the tumbler rings 19, 20, 21. By adjusting the finger 32 toa different position on the knob the combination chosen Willbe changed.j

Projecting from the inner face of the boss isf a circular rim 33 whichalso is formed With a circumferential groove 33 capable of engaging thetail end of the rack and With which the split portions 23 of the tumblerrings must be brought into alinement before the tail end4 of the rackWill be allowed to l movel downwardly.

Y vInstead of the rings 19, 20, 21 it is preferable touse theconstruction shown in Fig. 1Q, ,in Whicheach ring is provided on its cinnervcircumference With a number of radial vmark on the outer face` ofthe boss. .movement all rings are being consecutively7 `brought into acertain position by the pin incisions ormgrooves r34 substantially ofvsquare Vcross section. These grooves are equidistantlydistributed andconform in spacingvvith that of the cavities 31 in the boss 24 and eachserves to frictionally hold a pin 35 of square cross section. The pins35 are placed in the grooves 34`in positions and numbers,"correspondingWith the particular combination chosen.V

l The grooves 34 imparta certain resiliency to therings so that theextra recess 22 made inthe rings 19, 20, 21 can be dispensed With. Withsuch construction of the rings the ,combination can be readily changedby varying the positions of the pins 35 in the grooves 34.

j Themode of operation is as follows: Assuming that the shackle isclosed. Then the rack 18, is in its elevated position shovvn in F ig. 2and is immovable, by reason of the openingsv 2,3 of the rings 19, 20, 21being dis- .placedy relative to the open end of the groove 17 whichbears said rack. NOW to open the shackle the boss is first turned arounduntil the, finger 32 registers With a particular By this 27. No'vv theboss is. turned a certain distance in one direction Which distance ismeasured by the clicks produced by the ball y29 snapping into andpassing out from the cavities 31. As a result one of the rings isadjusted with its opening 23 in alinement with the groove 17. Then theboss is turned in opposite direction a distance corresponding to acertain other number of clicks and tail end 18 Will pass into theopenings 23 of "the rings and groove 33 of the'boss. When passing thetoothed end of the shackle into Athe bore 13 Ait ivill "engage thepinion 16 and cause the rack to move in the opposite direction,releasing thereby Ythe vrings Which on turning'the boss Will vbecomedisplaced and form a stop locking the rack.

fhat I claim is :4-

1. A pad lock comprising a body portion, a vertically movable andpivotally supported shackle and having its locking end toothed, a pinionin said body capable of meshing with said locking end, a rack arrangedparallel to said toothed end and meshing with said pinion diametricallyopposite Said toothed end and means for arresting said rack and therebylocking said pinion 'and shackle in closed position. v Y Y Y 2. A padlock comprisinga body portion having a cylindrical cavity, a shackleslidably and pivotally supported in said body and havingits locking endtoothed, a pinion rotatively fitted in said cavity and capable lOO callyopposite sides, a shackle slidably fand Y pivotally supported in saidybodyand having its locking end toothed, al pinion rotatively fitted insaid cavity and projecting With its yteeth through one of said sideopenings to engage said toothed end, a rackV parallelto the latter andmeshing With the teeth 'off said pinion projecting through "the oppositeopen Vend of said cavity, a rotary central member in said bodyk 'capableof arresting said rack,'so as to lock said pinion 'and shackle in closedposition and means; for

turning said member. Y Y, j 4. Apad lock, comprising a solid circulardisk having a central circular cavity: andcircumferential cavities, ashackleA rotativejly and slidablyk supported` in y,one of said circumferential cavities andhaving its free en d toothed, a pinionprojecting intoithe otherof said. circumferential cavities toengage saidVtoothed end ofthe shackle, a rack embedded in said body and meshingvvithfsaid Vpinion and a permutation lock in said central cavity to locksaid rack against movement. 5. In a pad lock, a shackle having itslocking end toothed, a gear meshing with said means for controlling saidrack to lock and toothed end, a rack meshing With said gear, unlock saidgear. 10 and a permutable means for locking and un- In testimony whereofI affix my signature locking said rack. in presence of two Witnesses.

6. In a pad lock, a longitudinally movable GEORGE GRONELL.

" shackle having its locking end toothed; a Witnesses:

gear meshing with said toothed end, a rack MAX G. QRDMANN, meshing withsaid gear and permutable JOSEPH T. MCMAHON.

